Hello,
This may be a question for One Control but I thought I'd ask here. I tried searching the forum but didn't find an answer. Let me start by saying I'm brand new to midi so there may be the problem. So my issue is that I'm unable to control the switches via the Midi in on the control switcher with the oc-10.

I have the OC-10 midi out => control switcher midi in => x4 1/4 cables running to a Mesa Triple Rectifier. The switching works fine just by pressing the buttons on the switcher itself.

I've set the control switcher to receive PC commands and changed the default CC numbers to 64-67, because from what I understand is that the oc-10 only goes from 0-69. One command change for each switch in the 10 banks. However even when switching up to numbers I'm seeing no change on my amp. The only response I get is if I manually push a switch in on the control switcher and then hit a switch on the OC-10 it'll revert the control switcher back to all switches off. I'm at a loss of what to do and any point in the right direction would be helpful.

Hopefully I was able to explain everything clearly, Thanks in advance.

It looks as if your Control Switcher is successfully receiving MIDI Program Change messages. Have you programmed any preset combinations to the Control Switcher?

Storing Control Switcher Presets with Program Change Messages
1. Press a preset button on your OC-10 that sends a Program Change message.
2. Set the Control Switcher switches to the state you want to save.
3. Press Button 1 and Button 4 at the same time to save. The LEDs should flash to confirm the saveed preset.
Now whenever you recall this preset on your OC-10, the Control Switcher should recall these stored switch settings and in turn set your amp to the correct channel.